CVE-2025-31691

Name: CVE-2025-31691
Creator: NVD / NIST
Published: 2025-03-31T22:15:21.737+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.37%

Last modified Jun 17, 2026

CVE-2025-31691 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.. EPSS estimates a 0.37% chance of exploitation in the next 30 days.

Description

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.37%

29.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-862

Affected Software

Vendor	Product	Versions
Oauth2 Server Project	Oauth2 Server	< 2.1.0

References

https://www.drupal.org/sa-contrib-2025-020Third Party Advisory

Timeline

Published: Mar 31, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-31691?

Missing Authorization vulnerability in Drupal OAuth2 Server allows Forceful Browsing.This issue affects OAuth2 Server: from 0.0.0 before 2.1.0.

How severe is CVE-2025-31691?

CVE-2025-31691 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.37% probability of exploitation in the next 30 days.

How do I fix CVE-2025-31691?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-31691?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST